There have been claims by those not-in-favor of man-made global warming arguments that recent warming trends on Mars prove that man has no stake in the whimsy of Earth’s climate. Penn State meteorologist Michael Mann calls that scapegoating (though suspiciously not answering the charge made against the argument!) “The small measured changes in solar output and variations from one decade to the next are only on the order of a fraction of a percent, and if you do the calculations not even large enough to really provide a detectable signal in the surface temperature record,” Mann explained.Flashback: Wheat Crops and Sunspots
“Solar activity continues to be one of the last bastions of contrarians,” he added. “People who don’t accept the existence of anthropogenic climate change still try to point to solar activity.”
IT is now more than 200 years since the great astronomer William Herschel observed a correlation between wheat prices and sunspots. When the latter were few in number, he noted, the climate turned colder and drier, crop yields fell and wheat prices rose.